OperationsFileKeyStoreService.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kaaproject.kaa.server.operations.service.security;

import org.kaaproject.kaa.common.endpoint.security.KeyUtil;
import org.kaaproject.kaa.server.common.Environment;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.File;
import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.PublicKey;

import javax.annotation.PostConstruct;

/**
 * The implementation of {#link KeyStoreService KeyStoreService} based on file.
 *
 * @author ashvayka
 */
@Service
public class OperationsFileKeyStoreService implements KeyStoreService {

  /**
   * The Constant LOG.
   */
  private static final Logger LOG = LoggerFactory.getLogger(OperationsFileKeyStoreService.class);

  /**
   * The private key location.
   */
  @Value("#{properties[operations_keys_private_key_location]}")
  private String privateKeyLocation;

  /**
   * The public key location.
   */
  @Value("#{properties[operations_keys_public_key_location]}")
  private String publicKeyLocation;

  /**
   * The private key.
   */
  private PrivateKey privateKey;

  /**
   * The public key.
   */
  private PublicKey publicKey;

  /**
   * Instantiates a new file key store service.
   */
  public OperationsFileKeyStoreService() {
    super();
  }

  /**
   * Load keys.
   */
  @PostConstruct
  public void loadKeys() {
    LOG.debug("Loading keys..");
    String privateKeyFullPath = Environment.getServerHomeDir() + "/" + this.privateKeyLocation;
    String publicKeyFullPath = Environment.getServerHomeDir() + "/" + this.publicKeyLocation;
    LOG.debug("Lookup private key: {}", privateKeyFullPath);
    LOG.debug("Lookup public key: {}", publicKeyFullPath);
    File file = new File(privateKeyFullPath);
    if (file.exists()) {
      try {
        privateKey = KeyUtil.getPrivate(file);
      } catch (Exception ex) {
        LOG.debug("Error loading Private Key", ex);
        throw new RuntimeException(ex); //NOSONAR
      }
    }
    file = new File(publicKeyFullPath);
    if (file.exists()) {
      try {
        publicKey = KeyUtil.getPublic(file);
      } catch (Exception ex) {
        LOG.debug("Error loading Public Key", ex);
        throw new RuntimeException(ex); //NOSONAR
      }
    }
    if (privateKey == null || publicKey == null) {
      KeyPair keyPair = generateKeyPair(privateKeyFullPath, publicKeyFullPath);
      privateKey = keyPair.getPrivate();
      publicKey = keyPair.getPublic();
    }
  }

  /* (non-Javadoc)
   * @see org.kaaproject.kaa.server.operations.service.security.KeyStoreService#getPrivateKey()
   */
  @Override
  public PrivateKey getPrivateKey() {
    return privateKey;
  }

  /* (non-Javadoc)
   * @see org.kaaproject.kaa.server.operations.service.security.KeyStoreService#getPublicKey()
   */
  @Override
  public PublicKey getPublicKey() {
    return publicKey;
  }

  public String getPrivateKeyLocation() {
    return privateKeyLocation;
  }

  public void setPrivateKeyLocation(String privateKeyLocation) {
    this.privateKeyLocation = privateKeyLocation;
  }

  public String getPublicKeyLocation() {
    return publicKeyLocation;
  }

  public void setPublicKeyLocation(String publicKeyLocation) {
    this.publicKeyLocation = publicKeyLocation;
  }

  /**
   * Generate key pair.
   *
   * @param privateKeyLocation the private key location
   * @param publicKeyLocation  the public key location
   * @return the key pair
   */
  private KeyPair generateKeyPair(String privateKeyLocation, String publicKeyLocation) {
    LOG.debug("Generating Key pair");
    KeyPair kp = KeyUtil.generateKeyPair(privateKeyLocation, publicKeyLocation);
    LOG.debug("Private key location: {}", privateKeyLocation);
    LOG.debug("Public key location: {}", publicKeyLocation);
    return kp;
  }

}